NEUR 1201 Lecture Notes - Lecture 7: Gene Expression, Cell Signaling, The Sequence
2 Feb 2017
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Molecular biology: introduction: by the early 20th century, living tissue was taken to consist largely of three different materials: carbohydrates, fats, and proteins, proteins are by far the most complex molecules in our body. They are large, often very delicate, and seem to be critical for all of the biochemical reactions that take place in our bodies: for this reason, the name protein comes from a greek word meaning (cid:858)of first i(cid:373)porta(cid:374)(cid:272)e(cid:859). Of first i(cid:373)porta(cid:374)ce : proteins do a lot of different things, so there are several types to consider: Structural: help to hold cells and tissue together, e. g___________. Enzymes: catalyze chemical reactions and aid in metabolism, e. g. _____________. neurotransmitters, and cytokines. Cell signaling: peptide neurotransmitters, receptors for hormones: proteins are giant, complex molecules, but they are built from a very simple set of supplies. There are 20 different amino acids to choose from, and the specific combination changes the function and structure of the protein.
